The generator matrix

 1  0  1  1  1  1  1  1  1  2  1  1  1  1 2a  1  1  1  1 2a+2  1  1  1  1  0  1  1  1  1  2  1  1  1  1 2a  1  1  1  1 2a+2  1  1  1  1  0  1  1  1  1  2  1  1  1  1 2a  1  1  1  1 2a+2  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  0  1  2  1 2a  1  1  1
 0  1 2a+3  a a+1  2 2a+1 a+2 a+3  1 2a  3 3a 3a+1  1 2a+2  1 3a+2 3a+3  1  0 2a+3  a a+1  1  2 2a+1 a+2 a+3  1 2a  3 3a 3a+1  1 2a+2  1 3a+2 3a+3  1  0 2a+3  a a+1  1  2 2a+1 a+2 a+3  1 2a  3 3a 3a+1  1 2a+2  1 3a+2 3a+3  1  0  2 2a+3 2a+1 2a  3  a a+2 3a 2a+2  1 3a+2  0  2 2a+3 a+1 2a+1  1 a+3  1 3a+1  1 2a  3 2a+2

generates a code of length 85 over GR(16,4) who´s minimum homogenous weight is 254.

Homogenous weight enumerator: w(x)=1x^0+108x^254+96x^255+36x^258+3x^260+3x^264+3x^276+6x^280

The gray image is a code over GF(4) with n=340, k=4 and d=254.
This code was found by Heurico 1.16 in 0.094 seconds.